> I'm a little afraid of heating it because of
> the spring inside the relay..
Everybody worries about that spring - it's nothing to be
concerned with unless you indulge in gross incompetence.
I'm not addressing this specifically to John - I've gotten
more than a few emails over time with folks afraid to deal
with a relay because they're afraid it's going to explode
like a shrapnel bomb from the power of the spring.
The spring itself is quite captive - it's held in its place
by the force of its own compression against the cone
bushings, and the bearing plates top and bottom as well.
Unless you get the whole relay cherry-red and literally
burn out the fiber bushings it won't escape the first
capture, and the second will get it in any case. Of course,
the relay will be scrap by then.
I've tanken more than a few of these apart and rebuilt them
- compared to a garage-door spring or the like that thing
in the relay is less than powerful. Admittedly, tapping the
shaft out with your face over the other end would be quite
stupid, but the disassembly force vectors aren't a
nightmare. If you tap the shaft and bushings out the first
thing that happens is the bushings on the exit end go
sideways, and the spring decompresses and pops up. The
Rover process of tying a sock over the exit point to
capture the bits works quite well - the total force
involved is not great and this works very well to contain
the flying bits.
Don't be dumb, wear your safety glasses and take care but
dont be afraid of the damned thing..... -ajr
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